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You searched for: creator:"Tolley, H. R. (Howard Ross), 1889-"
[texts]The theory of correlation as applied to farm-survey data on fattening baby beef (Volume no.504) - Tolley, H. R. (Howard Ross), 1889-
Caption title
Keywords: Calves; Correlation (Statistics)
Downloads: 33
[texts]Corn-belt farmers' experience with motor trucks : a study of 831 reports from farmers who own motor trucks (Volume no.931) - Tolley, H. R. (Howard Ross), 1889-
Caption title
Keywords: Trucks; Farm produce
Downloads: 17
[texts]The cost and utilization of power on farms where tractors are owned : 286 farms, Ohio, Indiana, Illinois, 1920 (Volume no.997) - Tolley, H. R. (Howard Ross), 1889-1958
Caption title
Keywords: Farms; Farm tractors
Downloads: 36
[texts]A method of testing farm-management and cost-of-production data for validity of conclusions (Volume no.307) - Tolley, H. R. (Howard Ross), 1889-

Keywords: Farm management
Downloads: 15
[texts]Tractors and horses in the winter wheat belt, Oklahoma, Kansas, Nebraska (Volume no.1202) - Tolley, H. R. (Howard Ross), 1889-
Caption title
Keywords: Farm tractors; Farm mechanization; Farm mechanization; Farm mechanization; Horses
Downloads: 38
[texts]Input as related to output in farm organization and cost-of-production studies (Volume no.1277) - Tolley, H. R. (Howard Ross), 1889-
Caption title
Keywords: Farm management; Input-output analysis
Downloads: 24
[texts]The standard day's work in central Illinois : performance of implements and crews as indicated by reports from 600 farmers in a typical corn-belt area (Volume no.814) - Tolley, H. R. (Howard Ross), 1889-
Caption title
Keywords: Agriculture
Downloads: 24
[texts]Experience of eastern farmers with motor trucks : an analysis of 753 reports from farmer truck-owners (Volume no.910) - Tolley, H. R. (Howard Ross), 1889-
Caption title
Keywords: Trucks; Farm produce
Downloads: 24
[texts]The manufacture and sale of farm equipment in 1920 : a summary of reports from 583 manufacturers (Volume no.212) - Tolley, H. R. (Howard Ross), 1889-
"Contribution from the Bureau of Public Roads."
Keywords: Farm equipment United States
Downloads: 31
[texts]Practical farm economics (Volume no.32) - Taylor, Henry C. (Henry Charles), 1873-1969
Contribution from Bureau of Agricultural Economics
Keywords: Farms; Farm produce
Downloads: 19
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